mesa/st: collapse tgsi deadcode

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/26272>

src/mesa/state_tracker/st_program.c

@@ -525,11 +525,7 @@ st_create_nir_shader(struct st_context *st, struct pipe_shader_state *state)
       struct pipe_compute_state cs = {0};
       cs.ir_type = state->type;
       cs.static_shared_mem = info.shared_size;
-
-      if (state->type == PIPE_SHADER_IR_NIR)
       cs.prog = state->ir.nir;
-      else
-         cs.prog = state->tokens;
 
       shader = pipe->create_compute_state(pipe, &cs);
       break;